Grid Spawner

Overview

The Grid Spawner offers to spawn prefabs in a grid.

The default Grid Spawner node

Detailed Explanation

The Grid Spawner is a powerful spawner that allows spawning objects in a grid with additional customization. We can choose where to spawn objects using the permitted area threshold, or add randomness to the transform of the spawned prefab. The difference between using this node and a Pose Set Spawner with the Grid Poses node is, that this node can perform some optimizations. This makes it the better choice when the objects are spawned in a grid and other pose based features are not needed.

Parameters

Inputs

Name	Type	Description
Heightmap	Map	Provides the heights for the spawned prefabs.
Permitted Area	Map	Provides the values for the permitted area threshold.

Controls

Name	Type	Description
Extents	float	The extents of the square region around the player in which objects will be spawned.
Permitted Area Threshold	float	Spawn positions will be discarded if the value in the permitted area map is below this threshold.
Grid Cell Size	float	The size of the individual square cells inside the Extents.
Prefab	GameObject	The prefab that will be spawned at the input poses.
Jittering	bool	Add jittering to the spawn position to break the pattern.
Scale	Interval	Set the scale of the spawned object to a random value inside the interval.
Translate Y	Interval	Additionally translate the spawned object with a random value inside the interval along the Y axis.
Rotate X	Interval	Rotate the spawned object with a random value inside the interval around the X axis.
Rotate Y	Interval	Rotate the spawned object with a random value inside the interval around the Y axis.
Rotate Z	Interval	Rotate the spawned object with a random value inside the interval around the Z axis.

Use Cases

Spawning with permitted area and a heightmap

The Grid Spawner spawning with Perlin noise height and only inside of buildings

This spawner will set the positions of the spawned prefab to the height of the Perlin noise. Since we use the permitted area feature we only allow objects to be spawned inside the area of real world buildings.